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Glass Furnauoa.

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T BA ATTERBURY. Glass Furnace.

Nu.. 228,296; Pamed Jlune i, W20.

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Glass Furnace. @m 22,2%. Mmmm Mm@ 11, mm;

illll l :WIMMI' WLTNESSES: l HNVENTH: /MyF 73. XX i /v stiften renne@noterete @onion irnonils n. .urenlang-ir, or brr'isnlnni,ri-zivnsvtvnnhi,'.xssicivon on cnn-HALF or nis uien'lj 'ro .1A-Mns.si-:AMANKirn-netter, on szinn PLACE.

'GLASSMFURNA SPECIFICATION forming part of Letters Patent No. 228,296,dented Tune LlEBO.

Application :inning: riitee; Lvo moiety To all whom it may concern: l

Beit known that I, Tuonzls B. Arren- BURY, oi Pittsburg, in the countyot' Allegheny end State of Pennsylvanin, lia-ve invented o. new anduseful Improvement iu Glass-Furnaces, of .which the following is o.full, clear,

in perspective, of the tire-wall, with the nirlue shown in dotted lines.Fig. V is n longitudinal vertical section` shelving n partitionwall inthe melting-tank.

My improvement relates to that class of fur,-v .necesv known as tenkfurnaees,y in which melting-pots are dispensed with. These furhefces 'esheretofore `onstructed have been inos'tjiised"threonine "Worin, wsflcli:lts'rmeling coarse batch forcasting into plates for building end otherpurposes.

Attempts have been made to use the trinkfurnaee for lliner work, such asblown and pressed were; but they have not been successt'nl, oniing tothe fact that dust and ashes come over from the fire and mingle n'iththe batch to such cnextent es to increase the cost of manufacture byspoiling so much of the work thntvtenlefurnaces have been confined tothe rough work heretofore referred to.

Tank-furnaces have also been constructed for generati Work yin'glass-makin They have' been built with the .tanks in severalcompartments-4,6. e., e compartment for melting the betclnfrorn whichthe melted glass llows under :t bifidgefwall or strainer in to nclarifying-compnrtmenlnend thence to the Working-tank, (es shown anddescribed in the patent to G. nud F. Siemens,No. 127,806,0f July1.13.1872.)

. Tenk i`ur1iaces have also been devised with seperate compartments-onefor melting end thev other for Working from, the molten glass ibeingtransferred from the melting to the Werli-v ing tank by ledling, inwhich ense tubular screens ere inserted in the working-tank to "nace andair-supplying keep beck theilontingforeign mettenms shown and describedIin the patent to Ells and 'Een bold, No. 128,7ll3., of Win15v 9, 187.2.)

Other and various formsof tank-furnaces hnvebeen devised; huteach haveproved worthless from various causes.

'lhe object ol' my invention is to overcome the defects heretoforeexisting in this class ot' fu11mees,n-nd to combine in n'tnnlbfurnncethe advantages ol' n pot-furnace; and to this end my invention consistsinl forming the interior of the furnace, both the crown or etch andthebottom or' melting,` tnnlt, of elliptical end concnve formintwodirections--viz., longitudinal and trnnsverse-Wherelolvv ngrentersuperficiel :tree of the batch is exposed to the notion of heet, end b vthe peculiar forino' the crown'or arch, e greater reverhernting actionof the heel;

is attained.

lt. further consists in combining with seid double elliptical furnace egas-producing fur,- devices for producing combustion of seid ges.

It' l.tlso consists in certnin details ot' construction, inore fullydescribed hereinafter.

Referring to the drawings, Adesignntes the exterior wells of thefurnace. B is the teni: or melting sind Working compertment,end is, bypreference, mede of 'lire-clay, such ns is used in the manufacture ofthe pots non; in genernl use. This tenh or melting-basin is c'oncnve endoval in two directions, hoth longitudinal and transverse, as shown. Bythis construction e larger surface or cree of the hatch is exposed tothe elction 'ot the cnloritic currents, and as liquefection teltes placeonthesnrtnce and around the edges the sloping or convex form of thebasin or teni; tends to hold the met-el together, utilizing the heet,which Wonld be thwwnoll' and Wasted in pots endteiihe of other forms, toreduce the underlying portions 'of the hat-ch to e liquid or workingstatte.

This form of tank also eneblee vthe Worlnnien--A to woritout the hatchmore coin-pletelly then heretofore, owing to the concentmtiongoi' themotel ormelted gless et theV centenof-the tenir., directly opposite theworking hole or holes, and by putting in division plantes oil tigreclnyor other materie-li thecolnpertments cnn he crown or arch of likeconfiguration, whereby exit-line and damper located therein, and the amelting or heating compartment of sphe- Working and illing holes, whenconstructed 1o roidal shape in outline is formed, substanand arranged tooperate in the manner detialltx7 as and for the purpose set forth.scribed.

5. In a glass-furnace, the combination of THOMAS B. ATTERBURY.

the gas-producing or combustion chamber, the Witnesses air-supplyingtubes or iues, the elliptical and concave arch and tank, as described,with the JAsUS. ATTERBURY, D. S. SALISBURY.

